JP6576065B2 - Mount and wastewater treatment equipment - Google Patents

Description

  The present disclosure relates to a gantry that supports members such as an air diffuser and a filter medium in a water treatment tank of a wastewater treatment apparatus.

  Conventionally, various members are arranged in a water treatment tank of a wastewater treatment apparatus. For example, a technique is disclosed in which a hollow filter medium and an air diffuser are arranged in a biological filtration tank, and the activity of aerobic microorganisms attached to the hollow filter medium is promoted by the air diffused from the air diffuser. In the disclosed technique, in order to prevent the hollow filter medium from floating and settling, porous members are disposed in the upper part and the lower part of the biological filtration tank, and the air diffuser and the hollow filter medium are provided between these porous members. And are arranged.

JP 2000-354882 A

  However, the actual situation is that no sufficient contrivance has been made with respect to the point that a frame such as a porous member that supports a member such as a hollow filter medium is disposed in the water treatment tank.

  The present disclosure provides a new water treatment technique using a gantry.

  For example, the present disclosure discloses the following application examples.

[Application Example 1]
A stand placed in the water treatment tank of the waste water treatment device,
A member support for supporting a target member including at least one of the air diffuser and the filter medium at a plurality of positions whose horizontal positions are different from each other;
One or more legs for projecting downward from the member support portion to support the member support portion on the bottom surface in the water treatment tank;
With
Each of the one or more legs has a plurality of openings communicating with each other.
Mount.

  According to this structure, since a member support part is supported by the 1 or more leg part on the bottom face in a water treatment tank, the position shift of a member support part can be suppressed. Moreover, since each of the one or more legs has a plurality of openings, it is possible to suppress the legs from stopping the flow of water in the water treatment tank.

[Application Example 2]
The gantry described in Application Example 1,
The member support part and the one or more leg parts are integrally formed.

  According to this configuration, the gantry can be easily manufactured.

[Application Example 3]
The mount according to application example 1 or 2,
Each of the one or more legs has a tapered shape in which the maximum diameter of the contour of the horizontal cross section decreases toward the lower side.

  According to this configuration, it is possible to easily manufacture the gantry including the leg portions.

[Application Example 4]
The frame according to any one of Application Examples 1 to 3,
The bottom surface of the water treatment tank includes an inclined portion inclined with respect to a horizontal plane;
In a state where the gantry is disposed in the water treatment tank, a specific leg portion of the one or more leg portions is disposed on the inclined portion of the bottom surface,
The lower surface of the specific leg portion is inclined according to the inclined portion of the bottom surface,
Mount.

  According to this configuration, the specific leg portion can appropriately support the member support portion on the inclined portion of the bottom surface of the water treatment tank.

[Application Example 5]
The gantry according to any one of Application Examples 1 to 4,
The legs are
A plurality of pillars extending downward from the member support;
A lower part connected to the lower end of the plurality of pillars and forming a lower surface of the leg;
Including gantry.

  According to this configuration, the leg portion can appropriately support the member support portion while allowing water to flow between the plurality of column portions.

[Application Example 6]
The gantry according to any one of Application Examples 1 to 5,
The said member support part is a mount frame containing the hole formation part which forms a some through-hole.

  According to this configuration, the member support portion can appropriately support the target member while allowing water to flow through the plurality of through holes of the hole forming portion.

[Application Example 7]
The gantry described in Application Example 6,
The said leg part is a mount frame connected to the cyclic | annular part which forms one through-hole of the said hole formation part of the said member support part.

  According to this structure, a leg part can be appropriately connected to the hole formation part which forms a some through-hole.

[Application Example 8]
Wastewater treatment equipment,
One or more water treatment tanks including a first water treatment tank;
A target member including at least one of an air diffuser and a filter medium disposed in the first water treatment tank;
The gantry according to any one of Application Examples 1 to 7, which is disposed in the first water treatment tank and supports the target member,
A wall portion forming at least a part of the side wall of either the flow path or the second water treatment tank;
With
The member support portion of the pedestal has a recess that forms a portion in which the edge of the member support portion is recessed toward the inner peripheral side of the member support portion when viewed from the top downward.
The wall is
A wall forming part that is disposed along the edge of the recess of the member support part and forms at least a part of the side wall of either the flow path or the second water treatment tank;
It is arranged above at least a part of the concave part of the member support part, and contacts the at least part of the concave part when the concave part is going to move upward. An upper restraining part for restraining movement;
The member supporting portion is disposed below at least a part of the concave portion, and contacts the at least part of the concave portion when the concave portion is about to move downward. A lower holding part that suppresses movement to the side,
Having
Wastewater treatment equipment.

  According to this structure, the position shift between a wall part and a mount frame can be suppressed.

[Application Example 9]
Wastewater treatment equipment,
One or more water treatment tanks including a first water treatment tank;
A target member including at least one of an air diffuser and a filter medium disposed in the first water treatment tank;
A pedestal arranged in the first water treatment tank and supporting the target member;
A wall portion forming at least a part of the side wall of either the flow path or the second water treatment tank;
With
The gantry includes a member support portion that supports the target member at a plurality of positions whose horizontal positions are different from each other.
The member support portion of the pedestal has a recess that forms a portion in which the edge of the member support portion is recessed toward the inner peripheral side of the member support portion when viewed from the top downward.
The wall is
A wall forming part that is disposed along the edge of the recess of the member support part and forms at least a part of the side wall of either the flow path or the second water treatment tank;
It is arranged above at least a part of the concave part of the member support part, and contacts the at least part of the concave part when the concave part is going to move upward. An upper restraining part for restraining movement;
The member supporting portion is disposed below at least a part of the concave portion, and contacts the at least part of the concave portion when the concave portion is about to move downward. A lower holding part that suppresses movement to the side,
Having
Wastewater treatment equipment.

  According to this structure, the position shift between a wall part and a mount frame can be suppressed.

[Application Example 10]
The wastewater treatment apparatus according to Application Example 8 or 9,
One of the gantry and the wall has an engaging claw that is elastically deformable,
The other of the gantry and the wall has an engaging part that engages with the engaging claw,
The gantry and the wall portion are connected to each other by the engagement claw engaging the engagement portion.
Wastewater treatment equipment.

  According to this configuration, the mount and the wall portion can be easily connected.

[Application Example 11]
The wastewater treatment apparatus according to any one of Application Examples 8 to 10,
The lower holding portion includes a first contact portion that contacts a first portion of the recess of the gantry,
The upper holding portion includes a second contact portion that comes into contact with a second portion located on the back side of the first portion of the recess of the gantry,
The gantry includes the first portion of the recess in contact with the first contact portion of the lower holding portion, and the second portion of the recess in contact with the second contact portion of the upper holding portion. It is arranged in one water treatment tank,
Wastewater treatment equipment.

  According to this structure, the shift | offset | difference of the direction of a mount frame with respect to a horizontal direction can be suppressed by the 1st contact part and the 2nd contact part.

[Application Example 12]
The wastewater treatment apparatus according to any one of Application Examples 8 to 11,
The wall portion is a portion that forms one of the upper holding portion and the lower holding portion, and when viewed from the upper side to the lower side, the edge of the recessed portion is placed on the edge of the recessed portion of the gantry. Having a ridge that overlaps the entire length of the
Wastewater treatment equipment.

  According to this structure, since the wrinkles of the wall portion can suppress the positional deviation over the entire length of the edge of the concave portion, the positional deviation of the gantry can be appropriately suppressed.

  The technology disclosed in this specification can be realized in various modes, for example, in a mode such as a gantry, a wastewater treatment device including a gantry, a wastewater treatment device including a gantry and a wall, and the like. can do.

It is explanatory drawing which shows the processing flow of the waste water treatment apparatus 800 as one Example. It is the schematic block diagram which looked at the waste water treatment apparatus 800 from the side. 1 is a schematic view of a wastewater treatment apparatus 800. FIG. 1 is a schematic view of a wastewater treatment apparatus 800. FIG. It is a schematic perspective view which shows the contact filter bed tank 830, the treated water tank 840, and the disinfection tank 850. It is a schematic perspective view which shows the structure of the partition plate 803, side wall part 842, 843, 844, the mount 900, the diffuser 834, and the air supply pipe 622. 2 is a schematic diagram showing a configuration of a gantry 900. FIG. It is the schematic of the bottom face 830s of the contact filter bed tank 830, and the mount 900 arrange | positioned in the contact filter bed tank 830. FIG. 5 is a perspective view of a part on the lower side of a wall portion 700 and a gantry 900. It is the schematic which shows a mode that the wall part 700 and the mount frame 900 are mutually connected. It is the schematic which looked at a mode that the wall part 700 and the mount frame 900 were connected mutually from the side.

A. Example:
FIG. 1 is an explanatory diagram showing a processing flow of a wastewater treatment apparatus 800 as one embodiment. The waste water treatment apparatus 800 of this embodiment performs a purification process of waste water from a general household (such an apparatus is also called a “septic tank”). The wastewater treatment apparatus 800 has a plurality of water treatment tanks in order to perform purification treatment through a plurality of steps. In the embodiment of FIG. 1, the waste water treatment apparatus 800 includes a contaminant removal tank 810, an anaerobic filter bed tank 820, a contact filter bed tank 830, a treated water tank 840, and a disinfection tank 850 in order from the upstream (left side in FIG. 1). Each water treatment tank is accommodated. The wastewater that has flowed into the wastewater treatment apparatus 800 is sequentially treated in the contaminant removal tank 810, the anaerobic filter bed tank 820, the contact filter bed tank 830, the treated water tank 840, and the disinfection tank 850, and then discharged to the outside of the wastewater treatment apparatus 800. Is done. Hereinafter, water flowing through each water treatment tank is referred to as “water to be treated” or simply “water”.

  FIG. 2 is a schematic configuration diagram of the waste water treatment apparatus 800 viewed from the side. FIG. 3 shows a schematic configuration of the waste water treatment apparatus 800 viewed downward from the AA cross section in FIG. In the lower part of FIG. 3, explanatory views showing respective walls of the contact filter bed tank 830 and the treated water tank 840 are shown. FIG. 4 shows a schematic configuration of the waste water treatment apparatus 800 viewed from the BB cross section in FIG. 2 toward the contaminant removal tank 810 side. FIG. 5 is a schematic perspective view showing a contact filter bed tank 830, a treated water tank 840, and a disinfection tank 850. In these drawings, the Z direction indicates the direction from the lower side to the upper side in the vertical direction, the X direction indicates the longitudinal direction (horizontal direction) of the waste water treatment apparatus 800, and the Y direction indicates the X direction and the Z direction. The direction (horizontal direction) orthogonal to each of these is shown. Hereinafter, the X direction is also referred to as “+ X direction”, the X direction side is also referred to as “+ X side”, the opposite direction of the X direction is also referred to as “−X direction”, and the −X direction side is also referred to as “−X side”. The same applies to the Y direction and the Z direction.

  The contaminant removal tank 810 is a water treatment tank that separates contaminants in the waste water. As shown in FIGS. 2 and 3, the contaminant removal tank 810 is disposed at the most upstream portion of the waste water treatment apparatus 800. Waste water (also called sewage) from the inflow port 802 first flows into the contaminant removal tank 810. The contaminant removal tank 810 has solid-liquid separation means (in this embodiment, an inflow baffle 812), and separates contaminants in the waste water from the water to be treated. The inflow baffle 812 of the present embodiment forms a flow path that guides water flowing into the contaminant removal tank 810 from the upper side to the lower side. Thereby, inflow baffle 812 is the direction (here + X direction) which goes to the anaerobic filter bed tank 820 which is a downstream water treatment tank in the flow direction of the solid substance contained in the water which flows into contaminant removal tank 810. Instead, it can be directed to the bottom of the contaminant removal tank 810. As a result, the contaminant removal tank 810 can deposit solid matter at the bottom. The water after the impurities are separated (removed) is transferred to the anaerobic filter bed tank 820 through the transfer opening 814.

  The anaerobic filter bed tank 820 is a water treatment tank that performs anaerobic treatment with anaerobic microorganisms. The anaerobic filter bed tank 820 has a filter medium 822 for attaching anaerobic microorganisms. The organic matter in the for-treatment water is decomposed by the anaerobic treatment. Moreover, the filter medium 822 can capture floating substances in the water to be treated.

  As shown in FIGS. 2 and 3, the side wall 803 on the downstream side (+ X side) of the anaerobic filter bed tank 820 is a wall that partitions the tank body 801 into two perpendicular to the X direction (hereinafter, This wall is also called “partition plate 803”). On the opposite side (+ X side) of the partition plate 803, when viewed from above, side wall portions 843, 842, and 844 arranged in a substantially U shape projecting from the partition plate 803 to the + X side (right side in FIG. 3). It has been fixed. A space surrounded by the partition plate 803 and the side wall portions 843, 842, 844 corresponds to the treated water tank 840. Out of the space on the + X side surrounded by the partition plate 803 and the tank body 801, the space outside the side wall portions 843, 842, and 844 corresponds to the contact filter bed tank 830. The configuration of the side wall portions 843, 842, and 844 will be described later.

  An advection opening 824 is formed in a part of the partition plate 803 that forms a boundary between the anaerobic filter bed tank 820 and the contact filter bed tank 830 (FIGS. 2 and 3). The advection opening 824 is disposed on the upper part of the partition plate 803, and the water surface WL is normally located in the middle of the advection opening 824. As will be described later, the water surface WL can vary between the low water level LWL and the high water level HWL. The water treated in the anaerobic filter bed tank 820 is transferred to the contact filter bed tank 830 through the transfer opening 824.

  The contact filter bed tank 830 is a water treatment tank that performs aerobic treatment with aerobic microorganisms. As shown in FIG. 3, the contact filter bed tank 830 is formed so as to surround three sides (+ Y direction, + X direction, and −Y direction) of the treated water tank 840. As shown in FIG. 5, a gantry 900 is disposed below the contact filter bed tank 830. On the upper side of the gantry 900, an air diffuser 834 is fixed. Further, an aerobic filter medium 833 for holding microorganisms is arranged on the gantry 900 (aeration device 834), and a contact material 832 for holding microorganisms is arranged on the aerobic filter medium 833. ing. Hereinafter, the entirety of the contact material 832 and the aerobic filter material 833 is referred to as a holding member 835. The air diffuser 834, the aerobic filter medium 833, and the contact material 832 are disposed on both sides (+ Y side and −Y side) of the treated water tank 840 (FIGS. 3 to 5). The aerobic filter medium 833 is also arranged on the + X side of the treated water tank 840 (FIG. 5). Hereinafter, when distinguishing two identical members arranged on the + Y side and the −Y side, a letter “p” is added to the end of the sign of the + Y side member, and at the end of the sign of the −Y side member. The letter “m” is added. For example, the + Y side contact material 832 is also referred to as a contact material 832p. In addition, in FIG. 5, each shape of several shown elements (for example, the mount 900, the diffuser 834, etc.) is simplified and shown.

  In this embodiment, the air diffuser 834 (FIG. 5) is configured using a pipe having a plurality of holes (not shown) provided on the bottom surface. Air supply pipes 622p and 622m are connected to the diffusers 834p and 834m on the + Y side and the −Y side, respectively. The air supply pipes 622p and 622m extend upward from the air diffusers 834p and 834m to a position higher than the water surface WL. Although not shown, the upper ends of the air supply pipes 622p and 622m are connected to an air diffusion valve. The air diffusion valve is connected to a blower (not shown), and distributes the gas (here, air) supplied from the blower to the + Y side air diffuser 834p and the −Y side air diffuser 834m. A user (for example, an administrator of the wastewater treatment apparatus 800) can adjust the distribution amount (balance) by adjusting the air diffusion valve.

  The air diffuser 834 supplies the bubbles BB containing oxygen to the holding member 835. A large number of bubbles BB discharged from the air diffuser 834 pass through the inside of the holding member 835 (members 832 and 833) and reach the water surface WL. A water flow is generated by the movement of the bubbles BB, and the water in the contact filter bed tank 830 is stirred. The aerobic microorganisms held by the holding member 835 (members 832 and 833) decomposes organic substances in the water to be treated using oxygen contained in the bubbles BB. In addition, by the action of nitrifying bacteria contained in the aerobic microorganism, ammonium ions contained in the water to be treated are oxidized to produce nitrite ions and nitrate ions (nitrification). Water (nitrification liquid) containing nitrate ions is transferred to the contaminant removal tank 810 by a circulating air lift pump 860 described later. The water treated in the contact filter bed tank 830 is transferred to the treated water tank 840 through a transfer opening 836 that connects the bottom of the contact filter bed tank 830 and the bottom of the treated water tank 840.

  The treated water tank 840 is a water treatment tank that temporarily retains the water transferred from the contact filter bed tank 830 and settles and separates solids in water (for example, sludge and suspended solids). As will be described later, the treated water tank 840 is an upward flow water treatment tank into which water flows from the bottom.

  As shown in FIG. 3, when viewed from above in the vertical direction, the second side wall portion 842 faces the partition plate 803, and the third side wall portion 843 faces the fourth side wall portion 844. The third side wall portion 843 connects the + Y side end portion 842 e 1 of the second side wall portion 842 and the partition plate 803. The fourth side wall portion 844 connects the end portion 842 e 2 on the −Y side of the second side wall portion 842 and the partition plate 803. The connection portion 843e between the third side wall portion 843 and the partition plate 803 and the connection portion 844e between the fourth side wall portion 844 and the partition plate 803 are disposed inside the both ends 803e1 and 803e2 of the partition plate 803. Yes. In addition, the partition plate 803 forms a −X side side wall portion (also referred to as a first side wall portion) of the treated water tank 840.

  As shown in FIG. 2, the lower portion 849 of the treated water tank 840 has a so-called hopper structure (hereinafter, the lower portion 849 is also referred to as “hopper portion 849”). In the hopper portion 849, the second side wall portion 842 is inclined with respect to the vertical direction, and the horizontal cross-sectional area of the treated water tank 840 is smaller toward the bottom (the inclined portion 842d of the second side wall portion 842 is reduced). Also called “inclined portion 842d”). Further, as shown in FIG. 4, in the lower portion 849L of the hopper portion 849, each of the third side wall portion 843 and the fourth side wall portion 844 is also inclined with respect to the vertical direction (side wall portion 843). , 844 are referred to as “inclined portions 843d and 844d”). The lower portion 849L has a so-called three-surface hopper structure. The solid matter separated in the treated water tank 840 is collected at the bottom of the treated water tank 840 (a narrower space than the upper part of the treated water tank 840) by the side wall portions 842, 843, and 844.

  As shown in FIG. 2, the lower end of the partition plate 803 is connected to the bottom surface of the tank body 801. On the other hand, as shown in FIGS. 2 and 4, the lower ends of the side wall portions 842, 843, and 844 are separated from the bottom surface of the tank body 801. The gaps between the lower ends of the side wall portions 842, 843, and 844 and the bottom surface of the tank body 801 correspond to the advection opening 836.

  As shown in FIG. 2, a circulating air lift pump 860 is provided in the treated water tank 840. The circulation air lift pump 860 is connected to a first advection pipe 861 extending upward from the bottom of the treated water tank 840 to above the high water level HWL, and an upper part of the first advection pipe 861, and above the contaminant removal tank 810. And a second advection pipe 863 extending with a gentle downward slope. An end on the bottom side of the first advection pipe 861 forms a suction port 862. An end of the second advection pipe 863 on the contaminant removal tank 810 side forms an outlet 864. Outflow port 864 is disposed within inflow baffle 812. The circulating air lift pump 860 transfers (returns) solids and water from the bottom of the treated water tank 840 to the contaminant removal tank 810. As described above, since the lower portion 849 of the treated water tank 840 has a hopper structure, the solid matter separated in the treated water tank 840 is collected in a narrow space at the bottom (near the inlet 862). As a result, the separated solid matter can be easily removed from the treated water tank 840. The circulating air lift pump 860 is driven by the air from the blower (not shown) described above. The distribution amount of air from the blower is adjusted by a valve (not shown). The circulating air lift pump 860 may be driven continuously. The circulating air lift pump 860 may be driven intermittently.

  The disinfection tank 850 is a water treatment tank that disinfects the water to be treated. The disinfection tank 850 is disposed on the upper part of the treated water tank 840 (FIG. 2). In this embodiment, the disinfection tank 850 has a discharge air lift pump 870. The suction port 872 of the discharge air lift pump 870 is disposed at a low water level LWL in the treated water tank 840, and the outlet 874 of the discharge air lift pump 870 is disposed upstream of the disinfection tank 850. Water in the vicinity of the water surface WL of the treated water tank 840 (water from which solid matter has been separated) flows into the discharge air lift pump 870 from the suction port 872. The water flowing into the discharge air lift pump 870 is transferred to the disinfection tank 850 little by little by driving the discharge air lift pump 870. The discharge air lift pump 870 can transfer water in a state where the water level WL is equal to or higher than the low water level LWL. Thus, in the normal use state, the lowest water level WL is the low water level LWL. Such a low water level LWL can be said to be a design minimum water level. The discharge air lift pump 870 is driven by the air from the blower (not shown) described above. The distribution amount of air from the blower is adjusted by a valve (not shown).

  The disinfection tank 850 has a medicine cylinder 854 filled with a disinfectant (for example, a solid chlorine agent). In the disinfection tank 850, the water to be treated comes into contact with the disinfectant, and the water to be treated is disinfected by the disinfectant. The sterilized water is discharged to the outside of the waste water treatment apparatus 800 through the discharge port 804.

  When a large amount of wastewater temporarily flows into the wastewater treatment device 800 (for example, at the peak inflow), the water levels WL of the water treatment tanks 810, 820, 830, and 840 upstream of the discharge air lift pump 870 are temporarily Therefore, it can rise above the normal water level (low water level LWL in the figure). In the example of FIG. 2, the water level WL can rise to the high water level HWL. When the water level WL exceeds the high water level HWL, the water overflows from the treated water tank 840 to the disinfecting tank 850 through an overflow opening (not shown) provided in the disinfecting tank 850. Thus, in a normal use state, the highest water level WL is the high water level HWL. Such a high water level HWL can be said to be the highest designed water level. When the amount of inflow water per unit time exceeds the assumed range, the water level can temporarily rise to a position higher than the high water level HWL.

  Thus, at the peak inflow, the increase in the amount of outflow per unit time from the contact filter bed tank 830 is suppressed by temporarily increasing the water levels of the plurality of water treatment tanks 810, 820, 830, and 840. . As a result, the possibility of untreated water flowing out from the contact filter bed tank 830 can be reduced. In this way, the discharge air lift pump 870 operates as a mechanism that suppresses an increase in the amount of outflow per unit time from the contact filter bed tank 830 caused by peak inflow (referred to as a “peak cut mechanism”).

  FIG. 6 is a schematic perspective view showing configurations of the partition plate 803, the side wall portions 842, 843, 844, the gantry 900, the air diffuser 834, and the air supply pipe 622. FIG. 7 is a schematic diagram showing the configuration of the gantry 900. 7 (A) and 7 (C) are side views, FIG. 7 (B) is a top view, and FIG. 7 (D) is a perspective view. FIG. 7E is a perspective view of a leg 950 described later. In this embodiment, one member 700 (FIG. 6) includes the entire side wall portions 842, 843, and 844 (also referred to as “wall portion 700”). The side wall portions 842, 843, and 844 of the wall portion 700 form part of the side wall of the treated water tank 840 (also referred to as “wall forming portions 842, 843, and 844”).

  As shown in FIGS. 7A to 7E, the gantry 900 includes a member support 910 that supports the air diffuser 834 (FIG. 6) and the aerobic filter medium 833 (FIG. 5), and a member support. 6 legs 950 projecting downward from 910.

  The member support part 910 is a member that expands in the horizontal direction, and when viewed from above (downward in the −Z direction) (FIG. 7B), the edge of the member support part 910 is formed over the entire circumference. A frame 912 which is a portion to be operated, and a lattice 914 formed on the inner peripheral side of the frame 912. The lattice 914 forms a plurality of through holes that penetrate the lattice 914 from the upper side toward the lower side. In the present embodiment, the shape of the lattice 914 is a honeycomb shape. As shown in FIG. 7D, on the upper side (+ Z side) of the member support portion 910 (here, the lattice 914), there are six hook-like locking portions 920 for locking the air diffuser 834. Is provided. As shown in FIG. 6, each of the air diffusers 834p and 834m is attached to the member support portion 910 by three locking portions 920. Thus, the member support part 910 supports the air diffuser 834 at a plurality of positions whose positions in the horizontal direction are different from each other. In addition, as shown in FIG. 5, a plurality of aerobic filter media 833 are arranged on the lattice 914. As described above, the member support portion 910 supports the plurality of aerobic filter media 833 at a plurality of positions whose horizontal positions are different from each other.

  Further, as shown in FIGS. 7B and 7D, the frame 912 is viewed from the upper side to the lower side (−Z direction), and the edge of the frame 912 (that is, the member support portion 910). The edge) has a concave portion 990 that forms a concave portion toward the inner peripheral side (here, + X side) of the member support portion 910. As shown in FIG. 6, the lower end of the wall 700 is connected to the recess 990. In FIG. 7B, a ridge 710 which is a part of the wall 700 is indicated by a broken line. Details of the bag 710 will be described later.

  FIG. 7E is a schematic perspective view showing one leg 950 cut out. The leg portion 950 in the figure indicates the lower right leg portion 950x of the six leg portions 950 in FIG. 7B. As shown in the figure, the leg portions 950x are connected to an annular portion 916, which is an annular portion forming one through hole of the lattice 914, and extend below the plurality of column portions 952, and below the plurality of column portions 952. And a lower portion 954 that is connected to the side end and forms the lower surface 950s of the leg portion 950x. The leg portion 950x has a plurality of openings formed by a plurality of column portions 952 and a lower portion 954. The plurality of openings communicate with each other. The structure of the other leg portion 950 is the same as the structure of the leg portion 950x in FIG.

  In the present embodiment, the shape of one annular portion 916 is a substantially hexagonal shape. One leg portion 950 includes six column portions 952. The six column portions 952 are connected to the six vertex portions of the hexagonal shape of the annular portion 916. The lower portion 954 is an annular portion that connects the six ends of the six pillar portions 952. In the present embodiment, the shape of the leg portion 950 is approximately the same as the shape of the hexagonal frustum extending downward from the annular portion 916. The six column parts 952 and the lower part 954 correspond to the sides of the hexagonal frustum. Here, the maximum diameter of the horizontal cross-sectional contour of one leg 950 (that is, the convex hull including all elements of one leg 950 in the horizontal cross-section) has six pillars 952 as apexes. The maximum diameter of the hexagon. In this embodiment, the maximum diameter decreases toward the lower side. Thus, the shape of the leg portion 950 is a tapered shape that decreases toward the lower side.

  FIG. 8 is a schematic view of the bottom surface 830 s of the contact filter bed tank 830 and the gantry 900 disposed in the contact filter bed tank 830. In the figure, a side view of a portion including two legs 950 (950a, 950b) on the −Y side of the gantry 900 (FIG. 7B), a cross-sectional view of the bottom of the tank body 801, It is shown. The cross section of the illustrated tank body 801 is a cross section of a portion of the gantry 900 that is in contact with the two illustrated leg portions 950 (950a, 950b), and shows a CC cross section in FIG. .

  The two illustrated leg portions 950 (950a, 950b) protrude downward from the member support portion 910 (-Z side) and support the member support portion 910 on the bottom surface 830s of the contact filter bed tank 830. ing. Other leg portions 950 (not shown) similarly support the member support portion 910 on the bottom surface 830s. Therefore, the position shift of the member support part 910 can be suppressed, for example, the member support part 910 is inclined. Further, as described above, each leg portion 950 has a plurality of openings communicating with each other. The water in the contact filter bed tank 830 can easily pass through the legs 950 through the openings of the legs 950. Therefore, it can suppress that the leg part 950 stops the flow of water below the member support part 910. FIG. As a result, it can suppress that the sludge which moved below the member support part 910 continues depositing, without moving.

  In the present embodiment, the entire gantry 900 is integrally molded using a molding die (for example, injection molding, hand lay-up molding, spray-up molding, etc.). As a material of the gantry 900, various resins such as polypropylene, polyethylene, fiber reinforced plastic (FRP), and dicyclopentadiene can be used. Moreover, you may employ | adopt the other material different from resin (for example, a metal, a ceramic, etc.).

  Thus, in this embodiment, the member support portion 910 and the plurality of leg portions 950 are integrally formed. Accordingly, since the work of fixing the leg portion 950 to the member support portion 910 is unnecessary, the gantry 900 can be easily manufactured.

  Each leg 950 has a tapered shape in which the maximum diameter of the contour (specifically, convex hull) of the horizontal cross section decreases toward the lower side (that is, the tip side of the leg 950). . Therefore, the lattice 914 and the legs 950 can be formed by a single molding. In this manner, the gantry 900 including the leg portion 950 can be easily manufactured. Further, when stacking a plurality of mounts 900, the end portion of the leg portion 950 can be inserted inside the leg portion 950 of the adjacent mount 900. As a result, when transporting the plurality of mounts 900, the space required for stacking the multiple mounts 900 can be reduced.

  Further, as described in FIG. 7E, the leg portion 950 includes a plurality of column portions 952 extending downward from the member support portion 910 (here, the annular portion 916), and a plurality of column portions 952. A lower portion 954 connected to the lower end and forming the lower surface 950s of the leg portion 950. The plurality of column portions 952 are arranged at positions separated from each other. A space between the column portion 952 and the adjacent column portion 952 corresponds to an opening. The plurality of column portions 952 form a plurality of openings, and the plurality of openings communicate with each other. The leg portion 950 can appropriately support the member support portion 910 while allowing water to flow between the plurality of column portions 952.

  Further, as shown in FIGS. 7B and 7D, the member support portion 910 includes a lattice 914 that forms a plurality of through holes. Therefore, the member support portion 910 can appropriately support the air diffuser 834 and the aerobic filter medium 833 while allowing water to flow through the plurality of through holes of the lattice 914.

  Further, as described in FIG. 7E, the leg portion 950 is connected to the annular portion 916 that forms one through hole among the plurality of through holes of the lattice 914. Therefore, the leg 950 can be appropriately connected to the lattice 914 that forms a plurality of through holes. Further, the through holes of the lattice 914 and the openings of the leg portions 950 communicate with each other. Therefore, it can suppress that the connection part of the grating | lattice 914 and the leg part 950 stops the flow of water. And since it is suppressed that the flow of water between the upper side and the lower side of the member support part 910 is suppressed, the sludge that has moved downward from the member support part 910 continues to accumulate without moving. Can be suppressed.

  Next, the shape of the lower surface 950s of the leg portion 950 will be described with reference to FIG. The first partial bottom surface 830as on the + X side of the bottom surface 830s of the contact filter bed tank 830 is inclined so that the height of the bottom surface (position in the + Z direction) gradually increases in the + X direction. Specifically, the first partial bottom surface 830as forms a corner of the inner surface of the tank body 801, and the shape of the first partial bottom surface 830as is a curved surface. The leg portion 950a of the gantry 900 is disposed on the first partial bottom surface 830as. The lower portion 954a of the leg portion 950a is formed such that the lower surface 954as of the leg portion 950a is inclined according to the shape of the first partial bottom surface 830as. That is, the shape of the lower surface 954as of the leg portion 950a is approximately the same as the shape of the portion of the first partial bottom surface 830as that overlaps the lower surface 954as of the leg portion 950a when viewed from above (downward in the -Z direction). It is. This suppresses an increase in the gap between the lower surface 954as of the leg portion 950a and the first partial bottom surface 830as. The first partial bottom surface 830as can appropriately support the lower surface 954as of the leg portion 950a.

  Of the bottom surface 830s in the figure, the second partial bottom surface 830bs on the −X side is inclined such that the height of the bottom surface (position in the + Z direction) gradually increases in the −X direction. The leg portion 950b of the gantry 900 is disposed on the second partial bottom surface 830bs. The lower portion 954b of the leg portion 950b is formed such that the lower surface 954bs of the leg portion 950b is inclined according to the shape of the second partial bottom surface 830bs. That is, the shape of the lower surface 954bs of the leg portion 950b is approximately the same as the shape of the second partial bottom surface 830bs that overlaps the lower surface 954bs of the leg portion 950b when viewed from above (downward in the −Z direction). It is. Thereby, it is suppressed that the clearance gap between lower surface 954bs of leg part 950b and 2nd partial bottom face 830bs becomes large. The second partial bottom surface 830bs can appropriately support the lower surface 954bs of the leg portion 950b.

  Similarly, the shape of the lower surface 950s of the other leg portion 950 is also formed in accordance with the shape of the portion of the bottom surface 830s that supports the lower surface 950s of the leg portion 950. Accordingly, the bottom surface 830s can appropriately support each of the plurality of legs 950.

  Although not shown in FIG. 8, the height of the bottom surface 830 s is not limited to the X direction and can vary along the Y direction. In this manner, the height of the bottom surface 830s can change along any horizontal direction. The shape of the lower surface 950 s of the leg portion 950 is formed in accordance with the bottom surface 830 s that changes in this way. Generally, when the bottom surface 830s includes an inclined portion that is inclined with respect to the horizontal plane, and the leg portion 950 is disposed on the inclined portion, the lower surface 950s of the leg portion 950 is inclined in accordance with the inclined portion. It is preferable. According to this structure, it can suppress that the clearance gap between the lower surface 950s of the leg part 950 and the bottom face 830s becomes large compared with the case where the lower surface 950s of the leg part 950 is a horizontal plane. Therefore, the leg portion 950 can appropriately support the member support portion 910 on the inclined portion of the bottom surface 830s.

  In the following cases, it can be said that the lower surface 950s of the leg portion 950 is inclined in accordance with the inclined portion of the bottom surface 830s. A surface obtained by projecting the lower surface 950s of the leg portion 950 (a surface that can come into contact with the bottom surface 830s) onto a horizontal plane passing through the highest portion of the lower surface 950s in parallel to the vertical direction is referred to as a virtual lower surface. When the maximum vertical distance between the lower surface 950s of the leg 950 and the bottom surface 830s (that is, the maximum distance of the gap) is smaller than the maximum vertical distance between the virtual lower surface and the bottom surface 830s, the lower surface It can be said that 950s is inclined according to the inclined portion.

  In the present embodiment, the lower surface 950s of the leg portion 950 is in contact with a plurality of positions on the inclined portion of the bottom surface 830s. In this case, since the load applied from the leg part 950 to the bottom surface 830s is dispersed at a plurality of positions, the tank body 801 and the leg part 950 can be prevented from being damaged. Note that the inclined portion of the bottom surface 830s may be a flat surface, a curved surface, or both a flat surface and a curved surface. In general, as the inclined portion of the bottom surface 830s, any portion inclined with respect to the horizontal plane can be employed. A plurality of contact positions between the lower surface 950 s of the leg portion 950 and the inclined portion of the bottom surface 830 s may be included in one continuous contact region, or may be configured by a plurality of contact points separated from each other. .

  Next, the connection between the gantry 900 and the wall 700 will be described. FIG. 9 is a perspective view of a part of the lower side of the wall portion 700 and the gantry 900. On the lower ends of the three side wall portions 842, 843, and 844 of the wall portion 700 (that is, the lower ends of the three inclined portions 842d, 843d, and 844d), a flange 710 is provided. The gutter 710 is a plate-like portion that protrudes approximately horizontally from the lower end of the side wall portions 842, 843, 844 to the outer peripheral side (contact filter bed 830 side). In this embodiment, the flange 710 is provided over the entire lower end of the side wall portions 842, 843, 844.

  The collar 710 is divided into three collar parts 712, 713, and 714. The first flange portion 712 is a portion that is provided at the lower end of the second side wall portion 842 and extends in the Y direction from the −Y side end to the + Y side end of the second side wall portion 842 (“the leading edge portion 712”). "). The second flange part 713 is provided at the lower end of the third side wall part 843, is connected to the + Y side end part of the first flange part 712, and extends from the + X side end of the third side wall part 843 to the −X side end. , Approximately a portion extending in the −X direction. The third flange portion 714 is provided at the lower end of the fourth sidewall portion 844, is connected to the −Y side end portion of the first flange portion 712, and extends from the + X side end of the fourth sidewall portion 844 to the −X side end. Until approximately the -X direction. Hereinafter, the flange portions 713 and 714 extending approximately parallel to the X direction are also referred to as “lateral flange portions 713 and 714”.

  An upper holding portion 720 is provided at a position higher than the first flange portion 712 on the second side wall portion 842. The upper holding portion 720 is a plate-like portion that protrudes in the + X direction substantially parallel to the first flange portion 712. An engaging claw 730 is provided between the first flange portion 712 and the upper holding portion 720. The engaging claw 730 engages with the gantry 900 and prevents the gantry 900 from coming off the wall portion 700.

  In this embodiment, the wall portion 700 including the three side wall portions 842, 843, 844, the flange 710, the upper holding portion 720, and the engaging claw 730 is integrally formed using a molding die. (For example, injection molding, hand lay-up molding, spray-up molding, etc.). As a material of the wall portion 700, various resins such as polypropylene, polyethylene, fiber reinforced plastic (FRP), dicyclopentadiene and the like can be used. Moreover, you may employ | adopt the other material different from resin (for example, metal etc.). In the present embodiment, the wall portion 700 is formed so that at least the engaging claw 730 can be elastically deformed.

  The concave portion 990 of the gantry 900 is divided into three frame portions 992, 993, and 994. The first frame portion 992 is a portion on the back side (+ X side) of the concave portion 990, and extends approximately in the Y direction (also referred to as “back frame portion 992”). Although not shown, the first frame portion 992 is formed with an engaging portion that engages with the engaging claw 730. The second frame portion 993 is connected to the end portion on the + Y side of the first frame portion 992 and extends approximately in the −X direction. The third frame portion 994 is connected to the end portion on the −Y side of the first frame portion 992 and extends approximately in the −X direction. Hereinafter, the frame portions 993 and 994 extending approximately parallel to the X direction are also referred to as “lateral frame portions 993 and 994”.

  The shape and size of the recess 990 of the gantry 900 are approximately the same as the shape and size of the flange 710 of the wall 700. When connecting the base 900 to the wall 700, the recess 990 of the base 900 is fitted into the lower end of the wall 700 (upper side of the flange 710).

  FIG. 10 is a schematic diagram showing how the wall 700 and the gantry 900 are connected to each other. 10A shows a state in the middle of connection, and FIG. 10B shows a state in which the connection is completed.

  As shown in FIG. 10A, the horizontal frame portions 993 and 994 of the recess 990 of the gantry 900 move relatively on the horizontal flange portions 713 and 714 of the flange 710 of the wall 700 toward the −X direction. As described above, the lower end portion of the wall portion 700 is inserted into the concave portion 990 of the gantry 900.

  In FIG. 4, the horizontal flange portions 713 and 714 and the horizontal frame portions 993 and 994 are shown. The second frame portion 993 is disposed on the second flange portion 713. In addition, an inclined portion 843d extends upward from an end on the inner side (treated water tank 840 side) of the second flange portion 713. The inclined portion 843d is inclined in the + Y direction so that the treated water tank 840 becomes wider upward. The inclined portion 843d extends from the −Y side of the second frame portion 993 to the + Y side of the second frame portion 993 through the second frame portion 993. As described above, the second frame portion 993 is sandwiched between the second flange portion 713 and the inclined portion 843d. Therefore, the second frame portion 993 prevents the second frame portion 993 from moving downward (−Z direction) by the second flange portion 713. Further, the second frame portion 993 is prevented from moving upward (+ Z direction) by the inclined portion 843d. The same applies to the third frame portion 994. The third frame portion 994 is sandwiched between the third flange portion 714 and the inclined portion 844d. The vertical movement of the third frame portion 994 is prevented by the third flange portion 714 and the inclined portion 844d. Therefore, when connecting the gantry 900 to the wall portion 700, the position of the recess 990 of the gantry 900 is prevented from being shifted to an unintended position far away from the position on the flange 710 of the wall portion 700.

  The connection is completed by moving the gantry 900 in the −X direction relative to the wall 700 from the state of FIG. 10A (FIG. 10B). In the state where the connection is completed, the back frame portion 992 of the gantry 900 is sandwiched between the leading edge portion 712 and the upper holding portion 720 of the wall portion 700. Further, the side wall portions 842, 843, and 844 of the wall portion 700 are disposed along the recess 990. The side wall portions 842, 843, and 844 include portions extending upward (+ Z side) from the same height as the concave portion 990.

  FIG. 11 is a schematic view of a state in which the wall portion 700 and the gantry 900 are connected to each other as viewed from the side. In the drawing, an outline of the wall 700 and the gantry 900 viewed from the DD cross section in FIG. 10B facing the −Y direction is shown. In the drawing, a part on the lower side of the wall 700 and a part on the −X side of the gantry 900 are shown. The DD cross section is a cross section perpendicular to the Y direction. In the drawing, hatching is given to a cross section of a part of a plurality of elements included in the DD cross section. Specifically, the cross sections of the rear frame portion 992 of the gantry 900, the leading edge portion 712, the inclined portion 842d, the upper holding portion 720, and the engaging claw 730 of the wall portion 700 are hatched. In the drawing, a third frame portion 994 of the gantry 900 and a third flange portion 714 of the wall portion 700 are shown. The connection between the wall 700 and the gantry 900 proceeds in the order of FIGS. 11 (A) to 11 (D).

  An engagement portion 980 is provided on the back frame portion 992 of the gantry 900. The engaging portion 980 is a wall extending downward (−Z direction). The engaging claw 730 of the wall 700 protrudes in the + X direction. The engaging claw 730 has a protrusion 730a protruding upward (+ Z direction). A surface 730as on the + X side of the protrusion 730a is an inclined surface that gradually decreases in the + X direction (also referred to as “an inclined surface 730as”).

  As described with reference to FIG. 10A, the third frame portion 994 of the gantry 900 moves relatively on the third flange portion 714 of the wall portion 700 in the −X direction. (FIGS. 11A and 11B). Then, the back frame portion 992 of the gantry 900 is inserted between the upper holding portion 720 and the tip portion 712 of the wall portion 700 (FIGS. 11C and 11D). Here, as shown in FIG. 11C, the engagement claw 730 has the upper surface (+ Z side surface) of the back frame portion 992 in contact with the lower surface (−Z side surface) of the upper holding portion 720. The protrusion 730 a contacts the lower end of the engagement portion 980. The gantry 900 is further moved in the −X direction relative to the wall portion 700. The engaging claw 730 can be elastically deformed. As a result, as shown in FIG. 11C, the engaging portion 980 that contacts the inclined surface 730as of the protruding portion 730a causes the protruding portion 730a (and thus the engaging claw 730) to face downward (−Z direction). Press down. The engaging claw 730 is pushed by the engaging portion 980 and is elastically deformed downward (−Z direction). Then, as illustrated in FIG. 11D, the engaging portion 980 moves to the −X side with respect to the protruding portion 730 a of the engaging claw 730. The shape of the engaging claw 730 that has been elastically deformed returns to its original shape. Thereby, the protrusion 730a of the engaging claw 730 is engaged with the surface on the + X side of the engaging portion 980. Thus, the connection between the gantry 900 and the wall 700 is completed.

  As described above, the wall portion 700 (FIG. 9) includes the wall forming portions 842, 843, 844 that form a part of the side wall of the treated water tank 840, the upper holding portion 720, and the flange 710. As described with reference to FIG. 10B, the wall forming portions 842, 843, and 844 are arranged along the edge of the concave portion 990 of the gantry 900. The upper holding portion 720 is disposed on the upper side of the back frame portion 992 in the recess 990. The upper holding portion 720 contacts the at least part of the back frame portion 992 when the back frame portion 992 is about to move upward (+ Z side), so that the back frame portion 992 (and thus the recess 990) with respect to the wall portion 700. ) To the upper side. The collar 710 is disposed below the recess 990. When the concave portion 990 is to move downward, the flange 710 contacts at least a part of the concave portion 990, thereby suppressing the downward movement of the concave portion 990 relative to the wall portion 700. Therefore, the position shift between the wall part 700 and the mount 900 can be suppressed. Hereinafter, the portion of the collar 710 that can come into contact with the concave portion 990 is also referred to as a “lower holding portion”.

  In addition, as described with reference to FIG. 11, the wall portion 700 has an engaging claw 730 that can be elastically deformed, and the mount 900 has an engaging portion 980 that engages with the engaging claw 730. 11D, the gantry 900 and the wall portion 700 are connected to each other when the engaging claw 730 engages with the engaging portion 980. Thereby, connection with the mount frame 900 and the wall part 700 can be performed easily.

In the present embodiment, the wall 700 and the gantry 900 are configured as follows. The rear frame portion 992 of the gantry 900 (FIG. 11D) is placed in the portion 720 e of the upper restraining portion 720 of the wall portion 700 facing the rear frame portion 992 in a state of being arranged in the contact filter bed tank 830. Contact. The gantry 900 supports an external force with a contact position P2 between the back frame portion 992 and the upper holding portion 720 (specifically, the portion 720e) as a fulcrum. Than the upper pressing section 720 (here, + X side) towards direction side toward the back of recess 990 disposed a leg 950, a force F1 upward (+ Z direction) from the bottom surface 830s of the contact filter bed tank 830 receive. Due to the force F1, the third frame portion 994 disposed on the opposite side (in this case, the −X side) from the fulcrum (contact position P2) toward the back of the recess 990 has − A force F2 in the Z direction is applied. The −X side end portion 994e of the third frame portion 994 is pressed against the corresponding portion 714e of the third flange portion 714 of the wall portion 700. Although illustration is omitted, the −X side end portion of the second frame portion 993 (FIG. 9) is also pressed against the corresponding portion of the second flange portion 713 of the wall portion 700. Contact position P2 between the back frame portion 992 and the upper holding portion 720, contact position P1 between the third frame portion 994 and the third collar portion 714, and contact position between the second frame portion 993 and the second collar portion 713 ( (Not shown) determines the direction (tilt) of the gantry 900 with respect to the horizontal plane. Accordingly, it is possible to suppress the deviation of the orientation of the gantry 900 with respect to the horizontal direction. Further, in this embodiment, the gantry 900 is configured such that the gantry 900 whose direction is determined in this way supports the air diffuser 834 horizontally. Therefore, the air diffuser 834 can be prevented from tilting. As a result, it is possible to prevent the gas from being discharged from some of the plurality of holes of the air diffuser 834. And it can suppress that the part which oxygen runs short in performing the aerobic process in the holding member 835 (here at least one of the aerobic filter medium 833 and the contact material 832) can be suppressed. Thereby, the whole holding member 835 (aerobic filter medium 833 and contact material 832) can be appropriately used for the aerobic treatment. Further, the positional shift of the gantry 900 can be suppressed without fixing the gantry 900 to the partition plate 803. Therefore, the work of fixing the gantry 900 to the partition plate 803 can be omitted. Moreover, since the through-hole for fixing the mount 900 can be omitted from the partition plate 803, water leakage through such a through-hole can be prevented.

  Further, in FIG. 7B, an overlapping portion 97, which is a portion where the concave portion 990 and the flange 710 overlap with each other when facing from the upper side to the lower side (−Z direction), is indicated by hatching. As shown in the drawing, the overlapping portion 97 includes the edge of the recess 990 (particularly, the edge forming the recessed portion) over the entire length. That is, when viewed from the top to the bottom, the flange 710 overlaps the edge of the recess 990 over the entire length of the edge. Therefore, the flange 710 can suppress positional deviation over the entire length of the edge of the recess 990. As a result, the positional shift of the gantry 900 can be appropriately suppressed.

B. Variations:
(1) As a configuration of the gantry arranged in the water treatment tank, various other configurations can be adopted instead of the configuration of the gantry 900 described above. For example, the total number of leg portions 950 can be any number greater than or equal to one. Further, the member support part 910 and the leg part 950 may be separate members. In this case, as a method for connecting the member support portion 910 and the leg portion 950, any method can be employed. For example, you may fix the leg part 950 to the member support part 910 using an adhesive agent. Further, the recess 990 may be omitted.

  In addition, as a configuration of a portion (referred to as a “hole forming portion”) of a member support portion that supports a target member such as a filter medium in the gantry (referred to as “hole forming portion”), the configuration of the lattice 914 is used instead Various other configurations can be employed. For example, a member obtained by forming a plurality of through holes in a flat plate may be employed. In general, the hole forming portion preferably forms a plurality of through holes penetrating from the upper side toward the lower side. If such a hole formation part is employ | adopted, the water in a water treatment tank can go back and forth easily between the upper side and lower side of a member support part. As a result, it can suppress that the sludge which moved below the member support part continues depositing, without moving. In addition, as a shape of a through-hole, it replaces with a hexagon and other arbitrary shapes are employable (for example, a circle, a polygon, etc.). Moreover, you may abbreviate | omit such a hole formation part.

  Moreover, as a structure of the leg part of a mount frame, it replaces with the structure containing the pillar part 952 and the lower part 954 like the leg part 950x of FIG.7 (E), and can employ | adopt other arbitrary structures. For example, the shape of the contour of the horizontal cross section of one leg (that is, the shape of a convex hull including all the elements of one leg on the horizontal cross section) may be any other shape instead of a hexagon. Can be adopted. For example, a polygon such as a triangle or a quadrangle, a circle, or an ellipse may be employed. Further, the leg portion includes a portion where the maximum diameter of the contour of the horizontal cross section of the leg portion (specifically, the convex hull) is constant toward the lower side, and a portion where the maximum diameter increases toward the lower side. At least one of them may be included. For example, the leg portion may be a cylindrical pipe extending in the vertical direction. By forming a plurality of through holes in such a pipe, it is possible to suppress the legs from stopping the flow of water. Further, even when the leg portion is disposed on the inclined portion of the bottom surface of the water treatment tank, the shape of the lower surface of the leg portion may be different from the shape of the inclined portion. In addition, one leg portion may be connected to the member support portion in a state of straddling a plurality of through holes of the hole forming portion of the member support portion (for example, the lattice 914 in FIG. 7D). . In addition, a plurality of openings in the legs that communicate with each other may be omitted. For example, a cup-shaped member protruding toward the bottom of the water treatment tank may be used as the leg portion. Moreover, a leg part may be abbreviate | omitted. In this case, the edge of the gantry may be fixed at a predetermined position on the side wall of the water treatment tank.

  Further, as a portion of the gantry 900 that restricts the orientation to the gantry 900 with respect to the horizontal plane, that is, a portion that suppresses an unintended inclination of the gantry 900, an end 994e corresponding to the contact position P1 in FIG. Instead of the back frame portion 992 corresponding to the contact position P2, other arbitrary portions can be adopted. For example, the edge of the gantry 900 may be fixed at a predetermined position on the side wall of the water treatment tank. In this case, a portion of the edge of the gantry 900 that is fixed to the side wall can suppress an unintended inclination of the gantry 900.

(2) As the configuration of the wall portion connected to the gantry, other various configurations can be adopted instead of the configuration of the wall portion 700 described above. For example, the claw 900 may be provided with an engaging claw, and the wall 700 may be provided with an engaging portion that engages with the engaging claw of the gantry 900. Moreover, the engaging claw and the engaging part engaged with the engaging claw may be omitted. Moreover, a part of the collar 710 may be omitted. That is, when viewed from the top downward as shown in FIG. 7B, the portion of the edge of the recess 990 (particularly the edge forming the recessed portion) that overlaps the flange 710 is the edge of the recess 990. It may be only a part. In addition, a ridge that overlaps the edge of the recess 990 over the entire length of the edge may be a portion that forms the upper holding portion 720. Further, such wrinkles may be omitted. In addition, at least one of the upper holding portion 720 and the lower holding portion (in the example of FIG. 9, the flange 710) may be omitted.

  Moreover, the wall formation part of the wall part 700 may form the whole side wall instead of a part of side wall of a water treatment tank (for example, treated water tank 840). Further, the wall forming portion may include a portion extending downward from a position at the same height as the recess of the gantry. Moreover, the wall part 700 may be formed by connecting a plurality of members instead of the integrally molded member. Moreover, the wall part 700 may form at least one part of the side wall of the flow path (for example, baffle) in which water only moves instead of a water treatment tank.

(3) Instead of the contact filter bed tank 830, any other water treatment tank can be adopted as the water treatment tank for accommodating the gantry. For example, you may employ | adopt the anaerobic filter bed tank which has an anaerobic filter medium. And the stand arrange | positioned under the anaerobic filter medium in an anaerobic filter bed tank may support an anaerobic filter medium. The wall connected to the gantry may form at least a part of a side wall of a flow path (also called a baffle) through which water flowing into the anaerobic filter bed tank flows. Further, the wall portion may form at least a part of the side wall of the baffle through which water flowing out from the anaerobic filter bed tank flows. In general, it is preferable that the wall portion connected to the pedestal forms at least a part of one of the side walls of a flow path that simply moves water and a water treatment tank that treats water. In addition, a side wall is a wall which defines the horizontal range (namely, edge of a horizontal direction) of a flow path or a water treatment tank.

(4) The target member supported by the gantry may be only one of the air diffuser and the filter medium. The filter medium may be a member for holding anaerobic microorganisms (also called anaerobic filter medium) or a member for holding aerobic microorganisms (also called an aerobic filter medium). Various configurations such as a configuration including a net-like portion and a configuration including a plate-like portion (also referred to as “contact material”) can be adopted as the configuration of the filter medium. Moreover, as a structure of the diffuser supported by the gantry, any structure capable of discharging a large number of bubbles can be employed instead of the pipe having a plurality of holes. For example, the air diffuser may be configured using a porous material (also referred to as a “diffuser”). In any case, it is preferable that the gantry supports the target member at a plurality of positions whose horizontal positions are different from each other. According to this configuration, the gantry can appropriately support the target member.

(5) In the embodiment of FIGS. 9 and 10, the wall 700 is fixed to the partition plate 803, and then the gantry 900 is connected to the wall 700. Instead, the wall 700 may be fixed to the partition plate 803 after the gantry 900 is connected to the wall 700. Generally, as a procedure for assembling the waste water treatment apparatus 800, any procedure can be adopted.

(6) As the configuration of the wastewater treatment apparatus, various other configurations can be adopted instead of the configuration of the wastewater treatment apparatus 800 described above. For example, the anaerobic filter medium may be filled in the contaminant removal tank 810. Moreover, it may replace with the contact filter bed tank 830, and may employ | adopt the support | carrier flow tank with which the support | carrier holding microorganisms flows.

  Further, the processing flow is not limited to the flow shown in FIG. 1, and any other flow can be adopted. For example, a flow rate adjusting tank having a water level sensor and a transfer pump controlled according to the water level specified by the water level sensor may be provided. Further, a function for adjusting the flow rate (for example, a peak cut function or a flow rate adjusting tank) may be omitted. Moreover, as the total number of water treatment tanks provided in the waste water treatment apparatus, any number of 1 or more can be adopted. Moreover, you may employ | adopt the waste water treatment apparatus which processes not only the waste water from a household but industrial waste water.

  As mentioned above, although this invention was demonstrated based on the Example and the modification, Embodiment mentioned above is for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the spirit and scope of the claims, and equivalents thereof are included in the present invention.

97 ... Overlapping part, 622, 622p, 622m ... Air supply pipe, 700 ... Wall part, 710 ... Spear, 712 ... First scissor part (tip part), 713 ... Second collar part (horizontal collar part), 714 ... third collar part (lateral collar part), 730 ... engaging claw, 730a ... projection, 730as ... surface (inclined surface), 800 ... Wastewater treatment equipment, 801 ... Tank body, 802 ... Inlet, 803 ... Side wall (partition plate), 804 ... Outlet, 810 ... Contaminant removing tank, 812 ... Inflow baffle, 814 ... advection opening, 820 ... anaerobic filter bed, 822 ... filter media, 824 ... advection opening, 830 ... contact filter bed, 830s ... bottom, 830as. ..First part bottom surface, 830bs ... second part bottom surface, 832, 832p, 832m ... contact material, 833,833p, 833m ... aerobic filter medium, 834,834p, 834m ... diffuser 835 ... Holding member 836 ... Advection open , 840 ... treated water tank, 842 ... second side wall (wall forming part), 842d ... inclined part, 843 ... third side wall part (wall forming part), 843d ... inclined part, 843e ... connecting portion, 844 ... fourth side wall (wall forming portion), 844d ... inclined portion, 844e ... connecting portion, 849 ... hopper portion, 849L ... lower portion, 850 ... disinfection tank, 854 ... drug cylinder, 860 ... circulating air lift pump, 861 ... first advection pipe, 862 ... suction port, 863 ... second advection pipe, 864 ... Outlet, 870 ... Discharge air lift pump, 872 ... Inlet, 874 ... Outlet, 900 ... Base, 910 ... Member support, 912 ... Frame, 914 ... Grid 916 ... annular part, 920 ... locking part, 950, 950a, 950b, 950x ... leg part, 950s, 954as, 954bs ... bottom surface, 952 ... column part, 954, 954a, 954b ... Part, 980 ... engaging part, 990 ... concave part, 992 ... first frame part (back frame part), 993 ... second frame part (horizontal frame part), 994 ... third Frame (horizontal frame), P1 ... contact position, P2 ... contact position, BB ... bubble, WL ... water surface (water level), LWL ... low water level, HWL ... high water level

Claims (4)

Wastewater treatment equipment,
One or more water treatment tanks including a first water treatment tank;
A target member including at least one of an air diffuser and a filter medium disposed in the first water treatment tank;
A pedestal arranged in the first water treatment tank and supporting the target member;
A wall portion forming at least a part of the side wall of either the flow path or the second water treatment tank;
With
The gantry includes a member support portion that supports the target member at a plurality of positions whose horizontal positions are different from each other.
The member support portion of the pedestal has a recess that forms a portion in which the edge of the member support portion is recessed toward the inner peripheral side of the member support portion when viewed from the top downward.
The wall is
A wall forming part that is disposed along the edge of the recess of the member support part and forms at least a part of the side wall of either the flow path or the second water treatment tank;
It is arranged above at least a part of the concave part of the member support part, and contacts the at least part of the concave part when the concave part is going to move upward. An upper restraining part for restraining movement;
The member supporting portion is disposed below at least a part of the concave portion, and contacts the at least part of the concave portion when the concave portion is about to move downward. A lower holding part that suppresses movement to the side,
Having
Wastewater treatment equipment. A wastewater treatment apparatus according to claim 1,
One of the gantry and the wall has an engaging claw that is elastically deformable,
The other of the gantry and the wall has an engaging part that engages with the engaging claw,
The gantry and the wall portion are connected to each other by the engagement claw engaging the engagement portion.
Wastewater treatment equipment. The wastewater treatment apparatus according to claim 1 or 2,
The concave portion of the pedestal includes a first portion and a second portion located on the deeper side of the concave portion than the first portion,
The lower restraining part includes a first contact portion in contact with said first portion of said recess of said frame,
Wherein the restraining portion includes a second contact portion in contact with said second portion of said recess of said frame,
The gantry includes the first portion of the recess in contact with the first contact portion of the lower holding portion, and the second portion of the recess in contact with the second contact portion of the upper holding portion. It is arranged in one water treatment tank,
Wastewater treatment equipment.
The waste water treatment apparatus according to any one of claims 1 to 3,
The wall portion is a portion that forms one of the upper holding portion and the lower holding portion, and when viewed from the upper side to the lower side, the edge of the recessed portion is placed on the edge of the recessed portion of the gantry. Having a ridge that overlaps the entire length of the
Wastewater treatment equipment.